Tim Cook: Steve felt that most people live in a small box. They think they can’t influence or change things a lot. I think he would probably call that a limited life. And more than anybody I’ve ever met, Steve never accepted that.

He got each of us [his top executives] to reject that philosophy. If you can do that, then you can change things. If you embrace that the things that you can do are limitless, you can put your ding in the universe. You can change the world.

That was the huge arc of his life, the common thread. That’s what drove him to have big ideas. Through his actions, way more than any preaching, he embedded this nonacceptance of the status quo into the company.

Several other things are a consequence of that philosophy, starting with a maniacal focus to make the best products in the world. And in order to build the best products, you have to own the primary technologies. Steve felt that if Apple could do that—make great products and great tools for people—they in turn would do great things. He felt strongly that this would be his contribution to the world at large. We still very much believe that. That’s still the core of this company.

There’s this thing in technology, almost a disease, where the definition of success is making the most. How many clicks did you get, how many active users do you have, how many units did you sell? Everybody in technology seems to want big numbers. Steve never got carried away with that. He focused on making the best.

That took a change in my own thinking when I came to the company [Cook left Compaq to join Apple in 1998]. I had been in the Windows world before that, and that world was all about making the most. It still is.

When Apple looks at what categories to enter, we ask these kinds of questions: What are the primary technologies behind this? What do we bring? Can we make a significant contribution to society with this? If we can’t, and if we can’t own the key technologies, we don’t do it. That philosophy comes directly from him and it still very much permeates the place. I hope that it always will.